BIOL 200 Midterm | 100% Correct Answers |
Verified | Latest 2024 Version
The ecology of algae in aquatic ecosystems parallels that of plants in terrestrial ecosystems. Make three
points to support this statement. - ✔✔
Aglae and mosses/plants have similar features such as:
- branched apical growth
- cuticles
- asymmetrical flagellated cells
- cellulose, thylakoids, chlorophyll b, some have 2 flagella...
If some Euglenoids have the same pigment as green algae and higher plants, why are they not so closely
related? - ✔✔secondary endosymbiosis
Why evolve towards a substantial part of the cycle being diploid phase? - ✔✔- most of life cycle is in
gametic meiosis in the diploid phase and this permits diversity
- heterozygosity occurs in this phase
- all genes expressed in haploid phase are subject to selection and mutation but reduction in this phase
leads to protection of the gene.
-decrease in haploid phase reduces the uv or other fatal factors affecting the gene
Describe the primary and secondary mechanisms that generate biological diversity across the tree of life
- ✔✔Primary: natural and sexual selection based on the combination of genetic mutation and
environmental/spatial and temporal heterogeneity
Secondary: features and impacts of diversity that generate more diversity so development of more
structures, colonization, development of more advanced reproductive systems, interactions...
What are some structural differences between prokaryotes and eukaryotes? - ✔✔Eukaryotes have:
-dna in nucleus
- membrane bound organelles
-cytoskeleton
, -flagella
-larger ribosomes
-chromosome pairs
Why do people call viruses borrowed life? - ✔✔they can grow provide and produce but only with a host.
They are not able to generate life on their own.
What is a thermophilic environment? - ✔✔alkaline environment often found in deep sea vents protected
from UV it is extremely harsh/hot environment.
What are some biological characteristics of prokayrotes? - ✔✔surface area to volume ratio is important,
they are unicellular, one double stranded circular chromosome, lack nucleus, no sexual reproduction
What are some benefits to being 'so small?' - ✔✔- intimate contact with surroundings
- high rate of living
- rapid reproduction
- boom and bust
- but water is viscous (neg)
List the four steps of fission - ✔✔1. duplication of circular chromosome
2. cell elongation
3. ingrowth of plasma membrane
4. ingrowth of cell wall
What are 3 reasons for prokaryotic success in early earth? - ✔✔- small size
- rapid generation time
- prolonged dormancy
- diverse mechanisms
Verified | Latest 2024 Version
The ecology of algae in aquatic ecosystems parallels that of plants in terrestrial ecosystems. Make three
points to support this statement. - ✔✔
Aglae and mosses/plants have similar features such as:
- branched apical growth
- cuticles
- asymmetrical flagellated cells
- cellulose, thylakoids, chlorophyll b, some have 2 flagella...
If some Euglenoids have the same pigment as green algae and higher plants, why are they not so closely
related? - ✔✔secondary endosymbiosis
Why evolve towards a substantial part of the cycle being diploid phase? - ✔✔- most of life cycle is in
gametic meiosis in the diploid phase and this permits diversity
- heterozygosity occurs in this phase
- all genes expressed in haploid phase are subject to selection and mutation but reduction in this phase
leads to protection of the gene.
-decrease in haploid phase reduces the uv or other fatal factors affecting the gene
Describe the primary and secondary mechanisms that generate biological diversity across the tree of life
- ✔✔Primary: natural and sexual selection based on the combination of genetic mutation and
environmental/spatial and temporal heterogeneity
Secondary: features and impacts of diversity that generate more diversity so development of more
structures, colonization, development of more advanced reproductive systems, interactions...
What are some structural differences between prokaryotes and eukaryotes? - ✔✔Eukaryotes have:
-dna in nucleus
- membrane bound organelles
-cytoskeleton
, -flagella
-larger ribosomes
-chromosome pairs
Why do people call viruses borrowed life? - ✔✔they can grow provide and produce but only with a host.
They are not able to generate life on their own.
What is a thermophilic environment? - ✔✔alkaline environment often found in deep sea vents protected
from UV it is extremely harsh/hot environment.
What are some biological characteristics of prokayrotes? - ✔✔surface area to volume ratio is important,
they are unicellular, one double stranded circular chromosome, lack nucleus, no sexual reproduction
What are some benefits to being 'so small?' - ✔✔- intimate contact with surroundings
- high rate of living
- rapid reproduction
- boom and bust
- but water is viscous (neg)
List the four steps of fission - ✔✔1. duplication of circular chromosome
2. cell elongation
3. ingrowth of plasma membrane
4. ingrowth of cell wall
What are 3 reasons for prokaryotic success in early earth? - ✔✔- small size
- rapid generation time
- prolonged dormancy
- diverse mechanisms
